text: #!/usr/bin/env python
  # Contributed by Eric E Monson
  
  from PyQt4 import QtGui
  from PyQt4.QtGui import QApplication
  import vtk
  from vtk.qt4.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor
  import sys
  
  
  class Ui_MainWindow(object):
      def setupUi(self, MainWindow):
          MainWindow.setObjectName("MainWindow")
          MainWindow.resize(603, 553)
          self.centralWidget = QtGui.QWidget(MainWindow)
          self.gridlayout = QtGui.QGridLayout(self.centralWidget)
          self.vtkWidget = QVTKRenderWindowInteractor(self.centralWidget)
          self.gridlayout.addWidget(self.vtkWidget, 0, 0, 1, 1)
          MainWindow.setCentralWidget(self.centralWidget)
  
  
  class SimpleView(QtGui.QMainWindow):
  
      def __init__(self, parent=None):
          QtGui.QMainWindow.__init__(self, parent)
          self.ui = Ui_MainWindow()
          self.ui.setupUi(self)
          self.ren = vtk.vtkRenderer()
          self.ui.vtkWidget.GetRenderWindow().AddRenderer(self.ren)
          self.iren = self.ui.vtkWidget.GetRenderWindow().GetInteractor()
  
          # Create source
          source = vtk.vtkSphereSource()
          source.SetCenter(0, 0, 0)
          source.SetRadius(5.0)
  
          # Create a mapper
          mapper = vtk.vtkPolyDataMapper()
          mapper.SetInputConnection(source.GetOutputPort())
  
          # Create an actor
          actor = vtk.vtkActor()
          actor.SetMapper(mapper)
  
          self.ren.AddActor(actor)
  
  
  if __name__ == "__main__":
  
      app = QApplication(sys.argv)
      window = SimpleView()
      window.show()
      window.iren.Initialize()  # Need this line to actually show the render inside Qt
      sys.exit(app.exec_())
  